linux-kernel - [PATCH 0/2] userns: Creation logic fixes

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Message-ID: <871tf9cnbi.fsf_-_@x220.int.ebiederm.org>
Date:	Tue, 11 Aug 2015 20:22:57 -0500
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	"Kirill A. Shutemov" <kirill@...temov.name>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <keescook@...omium.org>,
	David Howells <dhowells@...hat.com>,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Ricky Zhou <rickyz@...omium.org>,
	Julien Tinnes <jln@...gle.com>
Subject: [PATCH 0/2] userns: Creation logic fixes


So I have take a good hard stare at the problem, as well as sitting down
and writing some test code to verify the code works the way I think it
does.

The following two patches are how I think this bit of chaos needs to be
solved.  If folks could take a once over these patches and possibly test
them to confirm they fix your issues I would appreciate it.

Eric W. Biederman (2):
      unshare: Unsharing a thread does not require unsharing a vm
      userns,pidns: Force thread group sharing, not signal handler sharing.

 kernel/fork.c           | 32 ++++++++++++++++++--------------
 kernel/user_namespace.c |  4 ++--
 2 files changed, 20 insertions(+), 16 deletions(-)

Eric
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